Sir Bernard Ingham, Thatcher’s press secretary, once revealed that his boss woke each morning to listen to Farming Today on BBC Radio 4.
He said: “She slept four hours a night on weekdays. I wasn’t with her at weekends. I guess she got a bit more then.”

WINSTON CHURCHILLL

Unlike Thatcher, Churchill valued his sleep – although that didn’t stop him from cutting his nighttime hours to just four during WWII.

He made up for the shortfall during the day, drinking a weak whiskey and soda before taking a two-hour nap. According to Churchill, the routine helped him to squeeze one and a half day’s work into 24 hours.

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After dinner at 6.30pm with his family, he would withdraw to the Treaty Room, his private office, and work until after midnight.
Obama aimed for around five hours of sleep a night, and believed 8am constituted a lie in.

NARENDRA MODI

Indian PM Narendra Modi is said to work 20 hour days – much to the dismay of his staffers.

The Indian PM credits yoga with his ability to survive on little sleep

Modi has previously put his extreme routine down to yoga, which he practises regularly.
He said: “All my doctor friends consistently advise me that I should increase my sleeping. I should sleep minimum for 5 to 6 hours.
“But I have become so workaholic and it has become my habit since many years that I hardly sleep for 3.5 hours. But it is a very sound sleep. I go to bed and within 30 seconds I fall asleep.”
He believes his deep breathing yoga techniques ensure that he is refreshed when he wakes up.

SILVIO BERLUSCONI

Former Italian leader Berlusconi’s bedroom behaviour is famous. But when it comes to sleeping, he actually gets just two to four hours.

After a quick bout of exercise, Johnson would crawl back into bed for a 30-minute nap, getting up around 4 pm and working into the early morning.
Johnson reportedly picked up his napping routine from his predecessor John F. Kennedy, who also broke up his day into shifts.

ANGELA MERKEL

The German Chancellor has previously spoken of her ability to store sleep when she’s engaging in important meetings.